Lug nut



FIG. 1 is a perspective view of the lug nut showing my new design;

FIG. 2 is a front view, in enlarged scale, thereof the undisclosed sides are identical;

FIG. 3 is a left end view, in enlarged scale, thereof; and,

FIG. 4 is a right end view, in enlarged scale, thereof. 

The ornamental design for a lug nut, as shown and described. 